Chain-drive bicycle



FIG. 1 is a perspective view of our chain-drive bicycle showing our new design;

FIG. 2 is a side elevational view of the chain-drive bicycle;

FIG. 3 is a side elevational view of the chain-drive bicycle;

FIG. 4 is a front elevational view of the chain-drive bicycle;

FIG. 5 is a rear elevational view of the chain-drive bicycle;

FIG. 6 is a top plan view of the chain-drive bicycle; and,

FIG. 7 is a bottom plan view of the chain-drive bicycle. 

The ornamental design for a chain-drive bicycle, as shown. 